At the World Science Fiction Annual Conference held in Los Angeles, USA in 1984, Gao Qiao Shenzhi, a Japanese animator and chief executive officer of Studio Hard, a Japanese art studio, formally expressed a kind of self-acting, dressed-up performance art behavior as a harmonious English word "Cosplay", hence its name.
https://www.ccosplay.com/
Therefore, Cosplay culture has become popular and developed in animation and game circles. At the same time, with various Cosplay activities, the introduction of media, and a large amount of information dissemination about Cosplay on the Internet, free participants in Cosplay have proliferated, and Cosplay has gradually developed truly and independently.
https://www.ccosplay.com/spider-man
It can be said that a considerable part of the concept of Cosplay in the world today has been inherited from Japan.